Improvement in studs and bearingsjfor sewing-machines



`for Sewing-Machines and UNITED STATEs PATENT QEFIGE.;

' LEviN T. JONES, 0E EALTIMoEE, MARYLAND.

iMPRovEMENT |N`sTuns AND BEARiNGsFoR SEWING-MACHINES, ac.

Speciiication forming wart of Letters Patent No. l 87,640, dated February 20, 1877; application filed February 3, 1877. i

To all whom it may concern Be it known that I, LEviN T. JoNEs, of Baltimore, in the county of Baltimore and State of Maryland, have invented a new and valuable Improvement in Studs and Bearings other Purposes;

and I do hereby declare that the following is a full, clear, and exact description of the construction and operation ofthe same, reference being had tothe annexed drawings, making a part of this specication, and to the letters and figures of reference marked thereon. Figure l of the drawings is a representation of an edge view of this invention, showing the ends of the bearings. Fig. 2 is a side view of the same. Fig. 3 is a perspective View of one section of a bearing. Fig. 4 is a. vertical section through the stud, wheel, and bearings. I

This invention has relation to means for taking up the lost motion of the shafts or journals of pulleys and other rotating parts of machinery; and it consists in the construction and novel arrangement of a set of slotted bearings on each side of the journal or shaft, the bearings of each set being adjustable toward each other, and fixed in this'adjustinent by sensei-@ws or other suitable fastenings, as hereinafter shown and described.

Iii the accompanying drawings I have illustrated this invention in its application to the journal or stud of a sewing-machine pulley.

The letter A represents the stud, having a conical shoulder, c, and a sleeve, b, havinga conical end, c, said sleeve being designed to be riveted, or otherwise rigidly secured, to the stud alter the hub of the pulley has been' slipped thereon.

B indicates the pulley, having thehub (l and eye e, through which the stud is designed to pass. On each side of said hub slideways or guides d are provided, extending on opposite sides of the eye parallel with each other. Between these guides are arrangedJ on opposite sides of the eye, two bearings, D, having rically in Q line concaveends g, which are nearly semicircular,

and beveled to correspond with the coni al shoulder a and sleeve end c of the stud. If the journal-shaft is cylindrical, these concave bearings may be nearlysemi-cylindrical, suiicient space being left between the ends g for adjustment toward each other to compensate for wearl In the body of each bearing, and parallel i with thetguides d, is a slot, s, through which passes aj, clamp-screw, K, by means of which the bearing is rigidly fixed in its adjustment. There tare two of these bearings on each side of the hub, diametrically opposite we another, so that there are founhmgings to the pulley, `All Vof these may be adjustable, as stated, oii two of themmmaywbe cast solid with the whpeell and two made"adjustable.-... w.

The operation is apparent. surfaces are worn away the bearings are set up toward each other to compensate for the wear, and render the wheel true. -Lateral i motion oftthe-guides is prevented by the abutments or guides d.

4similariadjustable bearings may be applied of needle-bars, and other i on opposite sides shafts orirods having reciprocating or .endwise motion, whereA a niceiadjustmeut, with a rapid motion, is important.

Havingi described this invention,` what I claim as new, and desire to secure by Letter..` 4

Patent,

The slotted adjustable bearings D, diametwith each` other, on opposite sides of ai journal or shaft, in combination with the parallel abutments or guides d and the olampg-screws K, substantially as specified. l

of two witnesses.

LEviN T.`JoNEs.

Witnesses: A p

W. ,5. WILKINSON, JAMES C. G. UNDUCT.

As the bearingl In testimony that I claim-th` above I hav hereunto subscribed my name in the presence 

